CVE-2026-103658

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-103658
StatePUBLISHED
AssignerAnthropic
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-12 22:17:03 UTC
Updated2026-10-16 15:20:39 UTC
DescriptionGNU Aspell 0.60.8.2 (first vulnerable version is not known) contains a heap-based buffer overflow write (CWE-122) in its read-only dictionary loader. String::reserve() in common/string.hpp computes its capacity check with a signed int ((int)s + 1), so a requested size of 0x7FFFFFFF wraps negative and the backing buffer is never grown. ReadOnlyDict::load() in modules/speller/default/readonly_ws.cpp passes the unvalidated 32-bit size fields from a .rws dictionary header into this path, so a crafted .rws file with a valid endian marker (12345678) and an oversized length field (e.g. lang_name_size = 0x7FFFFFFF) causes attacker-controlled data to be written out of bounds past an undersized heap allocation. An attacker who induces a victim to load a malicious dictionary — for example via aspell dump master <file> — can corrupt heap memory, resulting in denial of service and potentially code execution. Fixed in b830b6e and will be fixed in release 0.60.8.3.

Risk And Classification

Primary CVSS: v3.1 5.9 MEDIUM from 98a01053-8a31-4f6d-9aa9-252be161adc6

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

EPSS: 0.001550000 probability, percentile 0.041440000 (date 2026-10-14)

Problem Types: CWE-122 | CWE-122 CWE-122 Heap-based Buffer Overflow

VersionSourceTypeScoreSeverityVector
3.198a01053-8a31-4f6d-9aa9-252be161adc6Secondary5.9MEDIUMCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
3.1CNADECLARED5.9MEDIUMCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
Low

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA GNU Aspell affected 0.60.8.2 semver Not specified

References

ReferenceSourceLinkTags
github.com/GNUAspell/aspell/security/advisories/GHSA-p35p-2mw5-fj5j 134c704f-9b21-4f2e-91b3-4a467353bcc0 github.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Anthropic, Claude (en)

CNA: Ada Logics (en)

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